My 57 came with the Pontiac 347. One reason why I bought it. It did run but i've replaced it with a 502. I have it on an engine stand, like to find a tri power set up and rebuild. Rebuilds are expensive, main bearing sets are upwards of $150.
I tried to buy an all original 50's GMC with a Pontiac mill out of a guy's backyard a few years back. Wouldnt sell...it used to be his Dads truck. Before then I didnt know they used Pontiac motors either.
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